Bulgarian Squat in the Improvement of Asymmetries of Lower Limbs in Soccer Players

NCT04285593 | Withdrawn

• 1 other identifier: AJF
• Study Type: interventional
• Target: N/A
• Locations: 1 country
• Sites: 1

Brief Summary

1541/5000 The aim of the Bulgarian squat is to improve the hamstring strength and the stability of the knees, thus reducing asymmetries in the lower limbs. It consists in achieving greater strength and stability of the lower limbs to adapt the athlete to the demands of training and competitions as safely as possible. The main objective of the study is to assess the effectiveness of the Bulgarian squat, in the improvement of asymmetries in lower limbs; improving hamstring strength and knee stability. Randomized, simple blind clinical study. 30 soccer players will be randomized to the study groups: experimental (Bulgarian squats) and control (non-intervention team routine). The treatment will last 4 weeks, with 2 weekly sessions of 10 minutes each. The study variables will be: lower limb strength (vertical jump with the My Jump 2 application), lower limb stability (Y ™ -Balance test) and lower limb asymmetries (Triple Hop Test, Single Hop Test for Distance and Functional Movement Screen) The normality of the sample will be calculated using the Kolmogorov -Smirnof test. The changes after each evaluation will be analyzed with the t-student test and with an ANOVA of repeated measures, the intra and intersubject effect will be observed. The effect size will be calculated using Cohen's formula. An improvement in the strength, stability and asymmetries of the lower limbs in soccer players is expected.

Conditions

Football Players

Keywords

Football; Knee; Bulgarian squat; Vertical jump; Functional movement screen; Hamstring

Outcome Measures

Primary Outcomes (1)

• Change from baseline hamstring muscle strength after treatment and at month

  It will be done through the vertical jump Through the Appstore My Jump 2. The athlete will stand in standing position with the feet in parallel with a separation corresponding to the height of her hips. It will start with a knee flexion of 90º and with the arms along the body. You will be asked to perform a jump by bringing the lower limbs to a triple flexion (hip, knees and ankles). At the same time that it is pushed by pressing on the heels, it will take the arms in the take-off phase above its head. The load will be introduced if there is, in kg, and we will obtain the force time data (in Newton).

  Screening visit, within the first seven days after treatment and after one month follow-up visit

Secondary Outcomes (2)

• Change from baseline stability after treatment and at month

  Screening visit, within the first seven days after treatment and after one month follow-up visit

• Change from baseline asymmetries of lower limbs after treatment and at month

  Screening visit, within the first seven days after treatment and after one month follow-up visit

Study Arms (2)

Experimental group

EXPERIMENTAL

Each session will last 10 minutes, taking place two days a week, over a period of four weeks. The intervention will take place at the beginning of the training session. The players included in the experimental group will perform an exercise protocol with Bulgarian squats.

Other: Bulgarian squats

Control group

NO INTERVENTION

The players included in the control group will continue with their usual warm-up routine.

Interventions

Bulgarian squats OTHER

The intervention using Bulgarian squat exercises will consist in the application of the protocol described by Aguilera-Castells et al. The technique will be done with the footballer standing. The athlete with one foot in front and the other behind the body, arms crossed over her chest, and her upper body, will remain upright with a natural swing in the lower back during the entire exercise. The players will lower the body (eccentric phase) until the front knee flexes to 90º. Subsequently, they will return to the initial position with a full extension of the knee of the front leg (concentric phase), maintaining an erect trunk position. The front foot will be placed in a fixed position contacting the ground, and the rear foot will rest on a horizontal press bench.

Experimental group

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Female players
• With an age range of 18 to 35 years
• Federated in the Community of Madrid
• That at the time of the study do not suffer any injury

You may not qualify if:

• Athletes who have not undergone surgery on the lower limbs in the last three months
• Who have not taken muscle relaxants in the last three days
• Who have not understood or have a lack of understanding about the intervention
• Have not signed the informed consent document

Sponsors & Collaborators

• Investigación en Hemofilia y Fisioterapia: lead

Study Sites (1)

Universidad Europea de Madrid

Madrid, Comunity of Madrid, 28670, Spain

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: NETWORK
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 25, 2020
• First Posted: February 26, 2020
• Study Start: March 2, 2020
• Primary Completion: May 20, 2020
• Study Completion: June 10, 2020
• Last Updated: September 5, 2021

Record last verified: 2021-09

Locations

ES (1)